Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 07, 2017 - October 09, 2017
This paper describes about the joint properties and its improvement of SUS304 autocompleting friction welded joint, that welding method was developed by authors. The fixed specimen had the weld faying surface of 10 mm, and the joint was made with a friction speed of 27.5 s-1 and 17.6 s-1 and a friction pressure of 90 MPa. Also, the weld faying surface diameter of the insert piece had 12 mm and 10 mm. Then, the effect of the bottom of the grooves (groove bottom thickness) for the insert piece on the joining phenomena and joint properties were investigated. The joints with a friction speed of 17.6 s-1 had the circumferential shear fracture in the peripheral portion of the insert piece after the initial peak, although those with a friction speed of 27.5 s-1 did not have that fracture. In addition, the number of the joints with the weld faying surface diameter of the insert piece of 10 mm, which had the circumferential shear fracture in the peripheral portion of the insert piece, was large in comparison with those of 12 mm. As a conclusion, the joint achieved about 90% joint efficiency with the groove bottom thickness of 0.75 mm and the weld faying surface diameter of the insert piece of 10 mm which was made at a friction speed of 17.6 s ,-1 and this value was higher than that at the groove bottom thickness of 0.50 mm with a friction speed of 27.5 s .-1
